Packing-ring.



H'. B. KARLIN.

PACKING RING. AI PLIOATIOH FILED APR. 3, 1911.

. Patented Dec. 5, 1911.

5 vcvvtoz M @a/M @Hozuuf COLUMBIA ELANOGIAPH (DO-,WASHINOTON. D. C.

* UNITED STATES PATENT OFFICE. 1 HALFDAN BIRGER KA LIN, 0 srocKHoLivi, swEnnnnssreNoR' 'ro DE LAVA; STEAM TURBINE COMPANY, OF NEW YORK, N. Y., A ooRroRA'rIoN OF NEW JERSEY.

MPAGKING-BING.

Specification of Letters Patent.

Application filed April 3, 1911.

Patented Dec. 5, 1911.

Serial No. 618,541.

To all whom it may concern:

Be it known that I, HALFDAN BIRGER KARLIN, a subject of the King of Sweden, and a resident of Stockholm, Sweden, have invented certain new and useful Improvements in Packing-Rings, of which the following is a specification.

My invention relates to improvements in packing or tightening rings such as are employed for example between the rotors and stationary diaphragms of steam turbines and between the rotors and casings of blowers, centrifugal and other rotary pumps, and like machines; and the invention consists in a novel structure of said rings whereby increased heat-radiating surface is provided, and whereby expansion of the ring is permitted in a direction radially outward.

It is well known that, in use, packing or tightening rings such as referred to, when constructed in the ordinary manner, occasionally become over-heated through friction and acquire a permanent set which decreases the predetermined clearance. Such set is due to the fact that in rings as ordinarily constructed the metal is unable to expand diametrically, being held against such expansion by the diaphragm of the turbine or casing of the blower, pump, etc. The construction herein described provides increased radiating surface, thereby reducing liability to overheating, and further provides for the expansion of the ring in directions radially outward, thereby permitting the ring to expand freely with rise of temperature without acquiring permanent set.

I will now proceed to describe my invention with reference to the accompanying drawings, and will then point out the novel features in claims. 7

In the drawings: Figure 1 shows a detail transverse section of a portion of a turbine,

and shows in section a packing or anti-leakage ring constructed in accordance with my invention; and Fig. 2 is a similar section showing an alternative form of ring.

Referring first to Fig. 1, 1 designates the rotor of the turbine, 2 one of the stationary diaphragms of the turbine and 3 apacking or anti-leakage or tightening ring, located,

as is customary, between the diaphragm 2 and the rotor. I have shown the packing ring as provided with the customary rings 4 of anti-friction metal forming a surface of the ring 3 adapted for contact with the rotor 1.

As ordinarily constructed, packing rings such as ring 3 are solid rings and in case they become unduly heated through contactof the rotor with said packing ring, they acquire a permanent set for the reason previously stated. According to my invention, however, I construct said rings with grooves 5 extending longitudinally inward from the outer surface of the ring. In the construction shown in Fig. 1, two such grooves are shown, one extending from the right hand side of the ring inward, the other In the similar construction shown in Fig.

2, one of these grooves is between a portion of the outer surface of the ring 3 and the diaphragm 2. Obviously there may be as few or as many of these grooves 5 as conditions render desirable. The ring 3 maybe formed as a complete ring in one piece, or may be formed of a plurality of segments.

By the construction shown I provide a packing ring with a very large heat radiating surface. Furthermore, the grooves 5 permit free expansion of the ring without decrease in diameter thereof, thereby avoiding such expansion of the ring as will result in its acquiring a permanent set.

What I claim is 1. A packing or anti-leakage ring such 1 as described, provided with a plurality of grooves extending inward from opposite other, of an anti-leakage ring between said In testimony whereof I have signed this members, and centered with respect to one specification in the presence of two subof said members, and provided with a pluscribing witnesses.

rality of inwardly extending grooves of HALFDAN BIRGER KARLIN.

difi'erent radii, extending inward from op- Witnesses: posite lateral faces of said ring and over- WALDEMAR BoMAN, lapping. T. EKEBOHM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

